Knob attachment.



No. 660,259. Patented Oct. 23, I900.

H. LOMAX &. J. TOMLINSDN. KNOB ATTACHMENT.

(Application. filed Aug. 12; 1899.) (No Model.)

Wigwam H674? Lem 21 111. Bid 171 9372 m: 'Numus PETERS co. Mm'o umo" WASHINGTON, D. c

UNTTED STATES PATENT OFFICE.

HENRY LOMAX AND JOHN TOMLINSON, OF DARWEN, ENGLAND.

KNOB ATTACHMENT.

SPECIFICATION formingpart of Letters Patent No. 660,259, dated October 23, 1900. Application filed August 12,1899. Serial No. 727,001. (No model.)

To all whom it may concern.-

Be it known that we, HENRY LOMAX and JOHN TOMLINSON, subjects of the Queen of Great Britain, residing at Darwen, in the county of Lancaster, England, have invented new and useful Improvements in Door-Knobs, of which the following is a specification, application for patent having been filed in Great Britain February 13, 1899, and numbered 3,145.

Our invention relates to an improvement in door-knobs, having for its object the securing of knobs and similar handles to their spindles and their adjustment thereon suitable to the thickness of the door in a better and more accurate manner than those hitherto used.

On the drawings appendedhereunto,Figure 1 shows a side view of a pair of knobs fixed to a door, one of which is detachable and made according to our invention; Fig. 2, a side view, partly in section, of the detachable knob and looking-plate therefor; Fig. 3, aview of the under side of the knob; Fig. 4, afront view of the locking-plate and catch; Fig. 5, a front view of the base of the detachable knob locked to theplate and spindle.

The spindle a, operating the door lock orfastening, is permanently fixed at one end to the knob b or equivalent piece, as usual. The said spindle may be of any suitable see- I ,tion in the part passing through the door and is formed with a screw-thread on the projecting end, upon which the knob c, the base of which is tapped with a screw-thread, is screwed. A locking-plate cl is slipped upon the spindle and arranged so that it can slide, but is prevented from turning thereon in any suitable manner. A locking bar or catch 6 is hinged to the locking-plate and the knob.

is formed with a suitable recess, or more than one, for receiving the detent of the lockingbar, which when inserted and held in the recess after the knob c has been screwed upon the spindle as far as required locks the adjustable knob to the lock-plate and spindle, so that the latter can be turned by the knob or handle and operate the lock, latch, or other device for fastening the door.

Preferably we arrange the parts in the manner shown on the drawings. We make the spindle a square and screw the corners with a thread, as shown. The locking plate cl has a square hole in it, fitting with a sliding fit upon the square of the spindle, and is formed with a raised rim d and a projecting part (1 the rim being cut away at this part. The catch 6 is pivoted upon the projecting part at one end and has a detent or tongue e formed on it. The knob c has a raised rim on the under side of its base 0', into which notches c are cut, preferably all around, and when the catch is turned into the position shown on Fig. 5 the tongue 6' enters one of the notches c and locks the knob 0, plate cl, and spindle 66 together. To hold the catch 6 in its locking position, the free end of it is tapped for a screw f, which, after being screwed through, is burred or riveted over at the end, so that it cannot come out of the catch. Opposite to the screw a hole is drilled into the projecting part 01 of the lockingplate, into which the nose of the screw enters when the latter is screwed in.

By having a series of notches in the base of the knob the distance between the two door knobs or handles can be very accurately adjusted.

We do not confine ourselves to the special shape and construction of the parts as shown; but these may be varied. Obviously instead of round knobs, as shown, handles of any other suitable form may be used.

What we claim as our invention is-- 1. The combination of a spindle for a doorfastening which spindle is screw-threaded and squared at its end, a locking-plate sliding on said squared end, a tapped knob screwed onto said spindle and formed with notches in its base, a catch hinged to said locking-plate and formed with a tongue engaging with any one of said notches, and a screw for fixing the catch whenengaged.

2.. The combination of a spindle for a doorfastening, a screw-thread formed on the end of said spindle, a locking-plate capable of sliding on said end but prevented from turning thereon and having a rim with a cut-away portion around its periphery, a tapped knob In testimony whereot We have hereunto set provided with notches at that portion which our hands in the presence of two Witnesses.

is Within said rim screwed onto said spindle, HENRY LOMAX.

a. projection upon said locking-plate, a catch JOHN TOMLINSON; 5 pivoted on said projection and adapted to en- Witnesses:

gage with said notch, and means for holding CARL BoLLiJ,

the catch engaged with said locking-plate. l R. J. URQUHART. 

